EP2407866A1 - Dispositif électronique portable et procédé pour déterminer l'emplacement d'un effleurement - Google Patents

Dispositif électronique portable et procédé pour déterminer l'emplacement d'un effleurement Download PDF

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Publication number
EP2407866A1
EP2407866A1 EP10169912A EP10169912A EP2407866A1 EP 2407866 A1 EP2407866 A1 EP 2407866A1 EP 10169912 A EP10169912 A EP 10169912A EP 10169912 A EP10169912 A EP 10169912A EP 2407866 A1 EP2407866 A1 EP 2407866A1
Authority
EP
European Patent Office
Prior art keywords
touch
touch data
data
touches
sensitive display
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10169912A
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German (de)
English (en)
Other versions
EP2407866B1 (fr
Inventor
Alon Shenfield
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BlackBerry Ltd
Original Assignee
Research in Motion Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Research in Motion Ltd filed Critical Research in Motion Ltd
Priority to EP10169912.2A priority Critical patent/EP2407866B1/fr
Priority to CA2743757A priority patent/CA2743757A1/fr
Publication of EP2407866A1 publication Critical patent/EP2407866A1/fr
Application granted granted Critical
Publication of EP2407866B1 publication Critical patent/EP2407866B1/fr
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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G06F3/04186—Touch location disambiguation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Definitions

  • the present disclosure relates to electronic devices including but not limited to portable electronic devices having touch-sensitive displays and their control.
  • Portable electronic devices include several types of devices including mobile stations such as simple cellular telephones, smart telephones, wireless PDAs, and laptop computers with wireless 702.11 or Bluetooth capabilities.
  • Portable electronic devices such as PDAs or smart telephones are generally intended for handheld use and ease of portability. Smaller devices are generally desirable for portability.
  • a touch-sensitive display also known as a touchscreen display, is particularly useful on handheld devices, which are small and have limited space for user input and output.
  • the information displayed on the touch-sensitive displays may be modified depending on the functions and operations being performed. Improvements in devices with touch-sensitive displays are desirable.
  • a method includes determining when a touch of a plurality of touches overlapping in time on a touch-sensitive display is discontinued, utilizing first touch data prior to the determining to identify a location of the touch, and when the first touch data is not established to be accurate, obtaining second touch data prior to the first touch data to identify the location of the touch.
  • An electronic device includes a touch-sensitive display, memory, and a processor operably coupled to the memory and to the touch-sensitive display to determine a change in number of touches when a touch of two touches is removed from a touch-sensitive display, utilize touch data received from the touch-sensitive display prior to determining the change to determine a location of the touch, and in response to determining that the touch data is associated with a low accuracy level of the touch-sensitive display, obtain previous touch data to determine the location of the touch.
  • FIG. 1 is a block diagram of a portable electronic device in accordance with the present disclosure.
  • FIG. 2 illustrates examples of touch locations determined when touches are detected on touch-sensitive display in accordance with the disclosure.
  • FIG. 3 is a flowchart illustrating a method of determining a location of a touch on a touch-sensitive display in accordance with the present disclosure.
  • the following describes an electronic device and method including determining when a touch of a plurality of touches overlapping in time on a touch-sensitive display is discontinued, utilizing first touch data prior to the determining to identify a location of the touch, and when the first touch data is not established to be accurate, obtaining second touch data prior to the first touch data to identify the location of the touch.
  • the disclosure generally relates to an electronic device, which is a portable electronic device in the embodiments described herein.
  • portable electronic devices include mobile, or handheld, wireless communication devices such as pagers, cellular phones, cellular smart-phones, wireless organizers, personal digital assistants, wirelessly enabled notebook computers, and so forth.
  • the portable electronic device may also be a portable electronic device without wireless communication capabilities, such as a handheld electronic game device, digital photograph album, digital camera, or other device.
  • FIG. 1 A block diagram of an example of a portable electronic device 100 is shown in FIG. 1 .
  • the portable electronic device 100 includes multiple components, such as a processor 102 that controls the overall operation of the portable electronic device 100. Communication functions, including data and voice communications, are performed through a communication subsystem 104. Data received by the portable electronic device 100 is decompressed and decrypted by a decoder 106. The communication subsystem 104 receives messages from and sends messages to a wireless network 150.
  • the wireless network 150 may be any type of wireless network, including, but not limited to, data wireless networks, voice wireless networks, and networks that support both voice and data communications.
  • a power source 142 such as one or more rechargeable batteries or a port to an external power supply, powers the portable electronic device 100.
  • the processor 102 interacts with other components, such as Random Access Memory (RAM) 108, memory 110, a display 112 with a touch-sensitive overlay 114 operably coupled to an electronic controller 116 that together comprise a touch-sensitive display 118, an auxiliary input/output (I/O) subsystem 124, a data port 126, a speaker 128, a microphone 130, short-range communications 132, and other device subsystems 134.
  • RAM Random Access Memory
  • memory 110 a display 112 with a touch-sensitive overlay 114 operably coupled to an electronic controller 116 that together comprise a touch-sensitive display 118, an auxiliary input/output (I/O) subsystem 124, a data port 126, a speaker 128, a microphone 130, short-range communications 132, and other device subsystems 134.
  • I/O auxiliary input/output
  • User-interaction with a graphical user interface is performed through the touch-sensitive overlay 114.
  • the processor 102 interacts with the touch-sensitive overlay
  • the processor 102 may interact with an accelerometer 136 that may be utilized to detect direction of gravitational forces or gravity-induced reaction forces.
  • the processor 102 may interact with one or more actuators 120 and/or one or more force sensors 122.
  • the portable electronic device 100 uses a Subscriber Identity Module or a Removable User Identity Module (SIM/RUIM) card 138 for communication with a network, such as the wireless network 150.
  • SIM/RUIM Removable User Identity Module
  • user identification information may be programmed into memory 110.
  • the portable electronic device 100 includes an operating system 146 and software programs or components 148 that are executed by the processor 102 and are typically stored in a persistent, updatable store such as the memory 110. Additional applications or programs may be loaded onto the portable electronic device 100 through the wireless network 150, the auxiliary I/O subsystem 124, the data port 126, the short-range communications subsystem 132, or any other suitable subsystem 134.
  • a received signal such as a text message, an e-mail message, or web page download, is processed by the communication subsystem 104 and input to the processor 102.
  • the processor 102 processes the received signal for output to the display 112 and/or to the auxiliary I/O subsystem 124.
  • a subscriber may generate data items, for example e-mail messages, which may be transmitted over the wireless network 150 through the communication subsystem 104.
  • the speaker 128 outputs audible information converted from electrical signals; and the microphone 130 converts audible information into electrical signals for processing.
  • the touch-sensitive display 118 may be a self capacitive touch-sensitive display.
  • a self capacitive touch-sensitive display may include a capacitive touch-sensitive overlay 114.
  • the overlay 114 may be an assembly of multiple layers in a stack including, for example, a substrate, a ground shield layer, a barrier layer, one or more capacitive touch sensor layers separated by a substrate or other barrier, and a cover.
  • the capacitive touch sensor layers may be any suitable material, such as patterned indium tin oxide (ITO).
  • One or more touches may be detected by the touch-sensitive display 118.
  • the processor 102 receives touch data, including a location of a touch. Touch data may include coordinate values of a single point of contact, such as a point at or near a center of the area of contact.
  • a touch may be detected from any suitable object, such as a finger, thumb or appendage.
  • the controller 116 and/or the processor 102 may detect a touch by any suitable contact member on the touch-sensitive display 118.
  • Two touches that overlap in time may be detected. Touches overlap in time when touch contact for one touch continues when another touch begins or when both touches begin and end at the same time. Coordinate values for both touches are included in the touch data and the coordinate values are provided to the processor 102 as pairs of coordinate values. The pairs of coordinate values are repeatedly provided to the processor 102 during the touches. When one of two touches is discontinued, for example, when a finger is lifted from the touch-sensitive display 118, a change in capacitance is detected at the controller 116 during lifting of the finger and may result in mismatch of the coordinate values.
  • the x coordinate value for one touch is incorrectly paired with the y coordinate value of the other touch and the x coordinate value of the other touch is incorrectly paired with the with the y coordinate value of the one touch.
  • This incorrect pairings are also known as ghost touches or ghost touch locations.
  • An example of two touch locations 204, 206 and corresponding ghost touch locations 208, 210 is shown in FIG. 2 .
  • the portable electronic device 100 may not be able to resolve the coordinates of the touches as the coordinates, x1, y1, of one touch 204, and the coordinates, x2, y2, of the other touch 206 may be incorrectly paired to provide the coordinate pair x1, y2 of one ghost touch 208 and the coordinate pair x2, y1 of the other ghost touch 210.
  • the optional actuator(s) 120 may be depressed by applying sufficient force to the touch-sensitive display 118 to overcome the actuation force of the actuator 120.
  • the actuator 120 may be actuated by pressing anywhere on the touch-sensitive display 118.
  • the actuator 120 may provide input to the processor 102 when actuated. Actuation of the actuator 120 may result in provision of tactile feedback.
  • the optional force sensor(s) 122 may provide force information related to a detected touch.
  • the force information may be utilized to select information, such as information associated with a location of a touch. For example, a touch that does not meet a force threshold may highlight a selection option, whereas a touch that meets a force threshold may select or input that selection option.
  • Selection options include, for example, displayed or virtual keys of a keyboard; selection boxes or windows, e.g., "cancel,” “delete,” or “unlock”; function buttons, such as play or stop on a music player; and so forth. Different magnitudes of force may be associated with different functions or input. For example, a lesser force may result in panning, and a higher force may result in zooming.
  • FIG. 3 A flowchart illustrating a method of determining a location of a touch on a touch-sensitive display is shown in FIG. 3 .
  • the method may be carried out by computer-readable code executed, for example, by the processor 102. Coding of software for carrying out such a method is within the scope of a person of ordinary skill in the art given the present description.
  • the method may contain additional or fewer processes than shown and/or described, and may be performed in a different order.
  • a computer-readable medium having computer-readable code may be executable by at least the processor 102 to perform the method.
  • the process may be carried out in on any displayed screen, such as a home screen or preferences menu, any suitable application, such as, email, text messaging, calendar, tasks, address book, or any other suitable application, and so forth.
  • one of the touches is detected as discontinued 302.
  • a touch is discontinued when touch data for one of two touches is no longer provided to the processor 102.
  • the touch data may be stored as coordinate pairs in a buffer, such as in the processor 102 or memory 110.
  • Discontinuation of one of the touches may be determined by comparison of the number of coordinate pairs in the touch data provided to the processor to the number of coordinate pairs provided in the previous touch data, e.g., during a prior sample interval.
  • the location of the remaining touch may be accurately determined based on the touch data provided to the processor when the other touch is discontinued, which touch data includes a single coordinate pair. Because a single coordinate pair is included in the touch data, incorrect pairing does not occur and the touch data is established to be accurate for the remaining touch.
  • the touch data i.e., the touch data collected prior to discontinuation of the touch, is retrieved from the buffer and is utilized 304 to identify the touch locations for the two touches, including the discontinued touch.
  • the touch data includes coordinate values for two or more touches at 306, the process continues at 308.
  • the previous touch data is established as accurate at 308, the process continues at 318.
  • Accuracy of the touch data is established at 308.
  • Accuracy of touch data may be based on whether the overlapping touch locations are resolvable.
  • the touch data may be established to be accurate based on an identifier associated with or included in the touch data.
  • the identifier may be, for example, a flag, such as a Boolean flag, that identifies touch data in which the touch locations may not be accurately resolved.
  • the flag may be set at the controller 116, for example, based on the number of overlapping touches, movement of a touch or touches, changes in touch signals as a result of changes in capacitive coupling at the time the touch data is collected, and/or other information indicating that the touch locations may not necessarily be correct or x, y coordinate pairs are conclusively resolved.
  • Touch data is established to be accurate when the identifier or flag is not set, i.e., touch data is not established to be accurate when the identifier or flag is set.
  • the process continues at 312.
  • the touch data is not collected within the predetermined period of time when the time between collecting the touch data and determining that the touch is discontinued is greater than the predetermined period of time, for example, within 50 ms.
  • the process continues at 318.
  • Previous touch data is obtained 312 from the buffer and is utilized to identify the touch locations for at least the discontinued touch, and the process continues at 306.
  • the previous touch data obtained at 312 is the touch data collected immediately previous to the touch data currently being evaluated, i.e., the touch data taken in time immediately previous to the touch data evaluated at 306, 308, 310 before 312.
  • Earlier touch data may repeatedly be obtained from the buffer until the touch data includes coordinate values for less than two touches, the touch data is established to be accurate, or the touch data falls outside the predetermined period of time.
  • the process continues at 318.
  • the touch data includes coordinate values for less than two touches (i.e., 0 or 1 touch) at 306, and the touch data includes 314 the coordinates of the discontinued touch
  • the touch data is discarded 316, and a touch location is not identified.
  • the touch location of the discontinued touch is identified, and the touch location, identified by the coordinates of the touch data, is utilized 318 with respect to information associated with the touch location.
  • a function may be performed based on the touch location. For example, a feature displayed on the touch-sensitive display 118 may be selected, such as a virtual key, button, or menu item.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • User Interface Of Digital Computer (AREA)
  • Telephone Function (AREA)
EP10169912.2A 2010-07-16 2010-07-16 Dispositif électronique portable et procédé pour déterminer l'emplacement d'un effleurement Active EP2407866B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP10169912.2A EP2407866B1 (fr) 2010-07-16 2010-07-16 Dispositif électronique portable et procédé pour déterminer l'emplacement d'un effleurement
CA2743757A CA2743757A1 (fr) 2010-07-16 2011-06-17 Dispositif electronique portatif et procede connexe pour determiner l'emplacement d'un toucher

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10169912.2A EP2407866B1 (fr) 2010-07-16 2010-07-16 Dispositif électronique portable et procédé pour déterminer l'emplacement d'un effleurement

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Publication Number Publication Date
EP2407866A1 true EP2407866A1 (fr) 2012-01-18
EP2407866B1 EP2407866B1 (fr) 2018-11-28

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CA (1) CA2743757A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2513756A2 (fr) * 2009-12-14 2012-10-24 Synaptics Incorporated Système et procédé pour mesurer une force individuelle par détection d'objets multiples
WO2013172829A1 (fr) * 2012-05-16 2013-11-21 Blackberry Limited Dispositif électronique portable et procédé de commande associé

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US20100214231A1 (en) * 2009-02-20 2010-08-26 Tyco Electronics Corporation Method and apparatus for two-finger touch coordinate recognition and rotation gesture recognition

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US20020036618A1 (en) * 2000-01-31 2002-03-28 Masanori Wakai Method and apparatus for detecting and interpreting path of designated position
US20070268269A1 (en) * 2006-05-17 2007-11-22 Samsung Electronics Co., Ltd. Apparatus, method, and medium for sensing movement of fingers using multi-touch sensor array
US20090174675A1 (en) * 2008-01-09 2009-07-09 Dave Gillespie Locating multiple objects on a capacitive touch pad
US20090309847A1 (en) * 2008-06-12 2009-12-17 You I Labs, Inc. Apparatus and method for providing multi-touch interface capability
US20100039405A1 (en) * 2008-08-13 2010-02-18 Au Optronics Corp. Projective Capacitive Touch Apparatus, and Method for Identifying Distinctive Positions
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2513756A2 (fr) * 2009-12-14 2012-10-24 Synaptics Incorporated Système et procédé pour mesurer une force individuelle par détection d'objets multiples
EP2513756A4 (fr) * 2009-12-14 2015-04-22 Synaptics Inc Système et procédé pour mesurer une force individuelle par détection d'objets multiples
US9377888B2 (en) 2009-12-14 2016-06-28 Synaptics Incorporated System and method for measuring individual force in multi-object sensing
WO2013172829A1 (fr) * 2012-05-16 2013-11-21 Blackberry Limited Dispositif électronique portable et procédé de commande associé

Also Published As

Publication number Publication date
EP2407866B1 (fr) 2018-11-28
CA2743757A1 (fr) 2012-01-16

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